A stator-rotor system and axial permanent magnet power equipment

Abstract

The present invention discloses a stator-rotor system and an axial permanent magnet power device. The system can form an integrated electromagnetic shielding structure with a motor body. Compared with the shielding method used in ordinary motors, the ideal electromagnetic radiation shielding efficiency can be achieved by adding limited weight. The multiple maze structures formed between the stator and the rotor effectively attenuate the external electromagnetic radiation of the motor and the external electromagnetic interference to the motor, effectively reduce the electromagnetic radiation of the motor, and also effectively improve the anti-electromagnetic interference ability of the motor. In addition, the dustproof, rainproof and other protection capabilities of the motor are also improved, and the heat dissipation of the motor is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to an integrated stator-rotor system and an axial permanent magnet power device with excellent electromagnetic shielding performance. Background Art

[0002] For the purpose of reducing weight, the disc motors that power multi-rotor UAVs are generally installed naked on the arms. Their electromagnetic radiation, especially the low-frequency electromagnetic radiation, not only affects the passing of electromagnetic compatibility tests (the most serious impact is on the electric field radiation test in the frequency band below 100MHz), but also has a particularly severe impact on the shortwave and ultra-shortwave communication relay stations (typical frequency range: 1.5MHz~30MHz and 30MHz~88MHz) mounted on the UAV, reducing the receiving sensitivity of the radio station and thus reducing the relay distance.

[0003] In order to solve the electromagnetic radiation problem of the power motor, the prior art generally adds an additional shielding cover to the motor to reduce the electromagnetic radiation and adopts a filter circuit to reduce the electromagnetic radiation.

[0004] The main disadvantages of the methods for solving electromagnetic radiation problems in the prior art are as follows:

[0005] 1. When adding a shielding cover, a special installation design should be added.

[0006] 2. Adding a shielding cover will increase the weight.

[0007] 3. Adding a shielding cover will have a negative impact on the heat dissipation of the motor.

[0008] 4. When using filtering circuits to reduce electromagnetic radiation, there are parameter matching problems and poor versatility.

[0009] 5. When using filtering circuits to reduce electromagnetic radiation, additional components and welding processes are required, which is not conducive to reliability.

[0010] 6. The volume and weight of the low-frequency filter are both large, and due to the limitations of weight and volume, the volume and weight of the filter are also limited. This creates a contradiction. It is difficult for the limited filter to achieve good electromagnetic compatibility performance. Summary of the invention

[0011] In view of the above problems, the present invention provides a stator-rotor system and an axial permanent magnet power device for overcoming the above problems or at least partially solving the above problems.

[0012] The present invention provides the following scheme:

[0013] A stator-rotor system, comprising:

[0014] A stator body, wherein a surface of one side of the stator body is provided with N protruding first metal plates, and the N first metal plates are arranged separately from each other so that the N first metal plates are arranged to form N-1 receiving slots;

[0015] A rotor body, wherein a surface of one side of the rotor body is provided with N-1 protruding second metal plates;

[0016] Among them, N-1 pieces of the second metal plates extend into the N-1 receiving slots in a free state respectively and one by one, forming a multi-rotating maze structure composed of multiple layers of staggered metal plates between the stator body and the rotor body, so that the inside and outside of the stator-rotor system form electromagnetic radiation shielding.

[0017] Preferably, the distance between the rotating planes of the stator body and the rotor body is 0.8-1.2 mm.

[0018] Preferably, the distance between the rotating planes of the stator body and the rotor body is 1 mm.

[0019] Preferably, the horizontal gaps of the N-1 accommodating grooves are all the same.

[0020] Preferably, the horizontal gap between the N-1 receiving grooves is 0.8-1.2 mm.

[0021] Preferably, the horizontal gap between the N-1 receiving grooves is 1 mm.

[0022] Preferably, the first metal plate and the second metal plate have the same thickness.

[0023] Preferably, the thickness of the first metal plate and the second metal plate are both 0.8-1.2 mm.

[0024] Preferably, the thickness of the first metal plate and the second metal plate are both 1 mm.

[0025] An axial permanent magnet power device comprises the above-mentioned stator-rotor system.

[0026] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0027] The embodiments of the present application provide a stator-rotor system and an axial permanent magnet power device, which can form an integrated electromagnetic shielding structure with the motor body. Compared with the shielding method used in ordinary motors, the ideal electromagnetic radiation shielding efficiency can be achieved by adding limited weight. The multiple maze structures formed between the stator and the rotor effectively attenuate the external electromagnetic radiation of the motor and the external electromagnetic interference to the motor, effectively reduce the electromagnetic radiation of the motor, and also effectively improve the motor's anti-electromagnetic interference ability. In addition, the motor's dust and rain protection capabilities are also improved without affecting the heat dissipation of the motor.

[0028] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 is a structural schematic diagram of a stator-rotor system provided by an embodiment of the present invention;

[0031] Figure 2 It is a cross-sectional view of an axial permanent magnet power device provided by an embodiment of the present invention.

[0032] In the figure: a stator body 1 , a first metal plate 11 , a rotor body 2 , a second metal plate 21 , a coil 3 , a permanent magnet 4 , and a mounting shaft 5 . DETAILED DESCRIPTION

[0033] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0034] See also Figure 1 , is a stator-rotor system provided by an embodiment of the present invention, such as Figure 1 As shown, the system may include:

[0035] A stator body 1, wherein a surface of one side of the stator body 1 is provided with N protruding first metal plates 11, and the N first metal plates 11 are arranged separately from each other so that the N first metal plates 11 are arranged to form N-1 receiving slots;

[0036] A rotor body 2, wherein a surface of one side of the rotor body 2 is provided with N-1 protruding second metal plates 21;

[0037] Among them, N-1 pieces of the second metal plates 21 extend into the N-1 receiving slots in a free state respectively and one by one, forming a multi-rotating maze structure composed of multiple layers of staggered metal plates between the stator body 1 and the rotor body 2, so that the inside and outside of the stator-rotor system form electromagnetic radiation shielding.

[0038] The stator-rotor system provided in the embodiment of the present application uses N first metal plates and N-1 second metal plates to form a multiple rotating maze structure between the rotor body and the stator body. The electromagnetic radiation generated by both the stator body and the rotor body can only be radiated outside the motor body after being attenuated by multiple layers of staggered metal plates; and the spacing between the rotating planes of the stator body and the rotor body is very small, so that the rotor body and the stator body form a nearly continuous metal body, which effectively shields the electromagnetic radiation inside the motor body, and thus significantly reduces the electromagnetic radiation radiated out of the body; similarly, the external electromagnetic radiation is also attenuated by multiple layers of staggered metal plates before it can reach the inside of the motor. The motor using this stator-rotor system does not need to install a shielding cover on the outside of the motor, nor does it need to set up any filtering circuit, and can obtain excellent electromagnetic shielding effect, and will not increase the volume and weight of the motor too much, thereby making the formed motor more widely used. The system is particularly suitable for disc motors with volume and weight requirements.

[0039] At the same time, in addition to improving the electromagnetic shielding effectiveness of the motor, this double rotating maze structure can also effectively reduce the possibility of foreign matter such as dust and rain entering the motor through the gap between the stator and the rotor.

[0040] It is understandable that the number of the first metal plates and the number of the second metal plates provided in the embodiment of the present application can be selected and determined according to actual needs. Figure 1 As shown, the diagram provides two first metal plates 11 and one second metal plate 21 to form a three-layer staggered rotating maze structure. The electromagnetic radiation generated by the stator body and the rotor body needs to be attenuated by the three layers of staggered metal plates before it can be radiated outside the motor body. Similarly, the external electromagnetic radiation also needs to be attenuated by the three layers of staggered metal plates before it can reach the inside of the motor, thereby significantly reducing the electromagnetic radiation radiated into and out of the motor.

[0041] In order to make the rotor body and the stator body form a nearly continuous metal body, the embodiment of the present application can provide that the spacing a between the rotating planes of the stator body 1 and the rotor body 2 is 0.8-1.2 mm. Further, the spacing a between the rotating planes of the stator body 1 and the rotor body 2 is 1 mm.

[0042] In order to further improve the shielding effect and ensure the stability of the stator body and the rotor body during relative rotation, the embodiment of the present application can also provide N-1 accommodating grooves, each of which has the same horizontal gap.

[0043] In order to further reduce the volume of the stator-rotor system provided by the present application and further improve the shielding effect, the embodiment of the present application can also provide that the horizontal gap b of each of the N-1 receiving slots is 0.8-1.2 mm. Further, the horizontal gap b of each of the N-1 receiving slots is 1 mm.

[0044] In order to further reduce the weight of the stator-rotor system, the embodiment of the present application can also provide that the first metal plate 11 and the second metal plate 21 have the same thickness. The thickness c of the first metal plate 11 and the second metal plate 21 are both 0.8-1.2 mm. Further, the thickness c of the first metal plate and the second metal plate are both 1 mm. The rotating maze is a thin-walled structure, and the horizontal gap of the rotating maze is 1 mm. Therefore, compared with ordinary motors of the same specifications, the weight increase of the motor in the present invention is very small. The gaps between the various parts provided in the embodiment of the present application can be adjusted by connecting the main shaft of the stator body and the rotor body.

[0045] In summary, the stator-rotor system provided by the present application can form an integrated electromagnetic shielding structure with the motor body. Compared with the shielding method used in ordinary motors, the ideal electromagnetic radiation shielding efficiency can be achieved by adding limited weight. The multiple maze structures formed between the stator and the rotor effectively attenuate the external electromagnetic radiation of the motor and the external electromagnetic interference to the motor, effectively reduce the electromagnetic radiation of the motor, and also effectively improve the motor's ability to resist electromagnetic interference. In addition, the motor's dust and rain protection capabilities are also improved without affecting the heat dissipation of the motor.

[0046] like Figure 2 As shown, an embodiment of the present application may also provide an axial permanent magnet power device, including the above-mentioned stator-rotor system.

[0047] In practical applications, the axial permanent magnet power device (disc motor) may also include any necessary related components required to constitute the device, and any structure required for installing other motor components may be provided inside or outside the stator body and the rotor body as required. For example, the inside of the stator body may be provided for installing the coil 3, the inside of the rotor body may be provided with a permanent magnet 4, and the stator body and the rotor body may be connected via a mounting shaft 5, etc.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0050] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A stator-rotor system, characterized in that: include: A stator body, wherein a surface of one side of the stator body is provided with N protruding first metal plates, and the N first metal plates are arranged separately from each other so that the N first metal plates are arranged to form N-1 receiving slots; A rotor body, wherein a surface of one side of the rotor body is provided with N-1 protruding second metal plates; Wherein, N-1 pieces of the second metal plates are respectively and one by one extended into the N-1 receiving slots in a free state, forming a multi-rotating maze structure composed of multiple layers of staggered metal plates between the stator body and the rotor body, so that the inside and outside of the stator-rotor system are shielded from electromagnetic radiation; The spacing between the rotating planes of the stator body and the rotor body is 0.8-1.2 mm; the horizontal gaps of the N-1 accommodating slots are the same, and the horizontal gaps of the N-1 accommodating slots are 0.8-1.2 mm; the thickness of the first metal plate and the second metal plate are both 0.8-1.2 mm.

2. The stator-rotor system according to claim 1, characterized in that: The distance between the rotating planes of the stator body and the rotor body is 1 mm.

3. The stator-rotor system according to claim 1, characterized in that: The horizontal gap between each of the N-1 receiving grooves is 1 mm.

4. The stator-rotor system according to claim 1, characterized in that: The first metal plate and the second metal plate have the same thickness.

5. The stator-rotor system according to claim 1, characterized in that: The thickness of the first metal plate and the second metal plate are both 1 mm.

6. An axial permanent magnet power device, characterized in that: The stator-rotor system comprises the stator-rotor system according to any one of claims 1 to 5.

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